Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
39 + 20 = ______
1 × 10 = ______
27 + 20 = ______
3 × 10 = ______
25 − 10 = ______
31 + 10 = ______
39 − 10 = ______
29 + 10 = ______
63 − 10 = ______
76 − 10 = ______
17 + 20 = ______
36 + 20 = ______
8 × 10 = ______
73 + 20 = ______
21 + 20 = ______
7 × 10 = ______
6 × 10 = ______
12 + 10 = ______
5 × 10 = ______
32 − 10 = ______
